Intel's Mesa Driver Is Going Faster For Unigine
Written by Michael Larabel in Intel on 19 October 2013 at 01:15 AM EDT. 8 Comments
Eric Anholt at Intel has a new Mesa GLSL patch to add a new pass for their compiler that decreases the number of instructions and can result in performance improvements.

The new GLSL pass in their compiler is CSE, constant sub-expression elimination. The CSE pass ran at the GLSL IR level is still rather simple but it's leading to a reduction in the number of generated command instructions for shaders. Eric noted that for the Unigine Tropics test the frame-rate went up by 11% with this new pass due to its heavy GL Shading Language usage. However, no metrics were provided for other GLSL-using Linux games.

The nearly 600 line patch for Mesa can be found right now on the Mesa development list. Once this new shader compiler pass is in the Mesa Git tree it will be benchmarked at Phoronix.
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Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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